You gotta love peoples "car knowledge"

I work in a boiler room with high turn over. Anytime we get a new guy I ask him to grab me a bucket of steam. I he turns around, I know how well he's gonna work out.

Haha, or a can of a1r. I've heard of guys on navy ships doing that to the newbies. Sometimes the newbs would even end up in the wheelhouse asking the captain of the boat for a can of a1r. He'd send them all the way back down into the boiler room: "go see the machinists for that, they'll have some". Ol' Captain was in on the joke as well.